Piping brakes

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Aug 15, 2007 | 09:35 PM

chilione99

Thread Starter

Freshman User

Joined: Jan 2006

Posts: 39

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From: Attleboro, MA

Piping brakes

Greetings. working on brake system, have new booster/master cylinder in, GM style combo valve in, (thinking I should have used a adj. proportional valve instead) and just ordered a 2 lb residual valve for front disc, 10 lb resid. valve for rear drum. going to use hyd. brake light switch, in "T" on front line. hoping this is going to do the trick with finishing brake system. Wondering if this is all necessary or if someone has some ideas. any help will be appreciated. Brakes are under floor in original locale.
#1 symptom= excessive petal travel. Bled system, get good braking(disc) but way down near the floor. Also will check shoes for adj. near drum. Braking never used to be this difficult/

1951 F1

Last edited by chilione99; Aug 15, 2007 at 09:37 PM. Reason: info

Aug 15, 2007 | 09:41 PM

blue68f100

Fleet Mechanic

Joined: Aug 2007

Posts: 1,833

Likes: 257

From: Piney Woods of East Texas

How does the petal rod connects to the master cylinder?
Do you have to much play? any adjustments?

Just throwing things out.

Aug 15, 2007 | 09:48 PM

chilione99

Thread Starter

Freshman User

Joined: Jan 2006

Posts: 39

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From: Attleboro, MA

used that adj. already. Connects with adjustable rod. but not that much. still have to maintain petal location in relation to firewall. Some weeks I make 4 steps forward, & other weeks...seems like I go backward 3 steps. Giving myself the month of Sept. off from hotrod. Life is Good!

Aug 16, 2007 | 08:03 AM

GreatNorthWoods

Lead Driver

Joined: Apr 2002

Posts: 8,813

Likes: 13

From: Littleton, New Hampshire

When you get the rear brakes adjusted I think the pedal will come up quite a bit. That was my experience.

Aug 16, 2007 | 12:58 PM

brucewolff

Elder User

Joined: May 2004

Posts: 553

Likes: 2

From: MN - NW of Twin Cities

Some good info on MPBRAKESdotCOM

Aug 16, 2007 | 01:27 PM

AXracer

Hotshot

Joined: Oct 2004

Posts: 15,882

Likes: 88

From: Durham NC

Check the plunger rod length between the MC and booster if it is too short you can get a lot of preliminary travel before getting solid brake pedal.

Aug 16, 2007 | 03:39 PM

Truxx1956

Posting Guru

Joined: Jul 2007

Posts: 2,344

Likes: 11

From: I live in Leitchfield, KY

Like the man said...

Most of your pedal is attained by the REAR brake shoes(if you have rear drums) If your rear shoes are out of adjustment, you won't have a pedal at all!!Did you say you installed the residual valves? cause you definately need the 10# residual valve for the rear for the pedal.Especially if the master cyl is located under the floor.Check all your adjustments!! Did you bench bleed the master cyl? I just bought a pressure bleeder, it forces the fluid down from the master cyl through the lines, you just open the bleeders in the correct order.
Hope this helps!!